Materials Literature
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The influence of heating temperature(1200 ℃,1180℃)of 180 mm cast slab,rolling passes for 2.3 mm hot coil(7 pass and 5 pass),finishing rolling temperature(780~860℃)and coil temperature(≤710℃)on iron loss and magnetic intensity of 0.5 mm cold rolled non-oriented silicon steel 50W600 has been tested. The results showed t…
A new die steel W4Mo3Cr4VRE(0.78～0.88C,3.50～4.50W,2.50～3.50Mo,3.80～4.40Cr, 1. 10~1.60V,0.15～0.25RE)was smelted by using high speed steel filings of grinding DRI(sponge iron 0.44C- 4.62W-3.27Mo-2.20Cr-0.98V)with definite amount scrap of high speed steel turnings(0.87C-3.50W- 1.30Mo- 1.50Cr- 0.60V)in a 250 kg induction…
The finite element simulation of stress and strain of 230 mm slab with casting rate 1.0 m/min and 3 different roller ways layout-single-point,four-point and continuous straightening have been carried out by elastoplastic finite element method. The results showed that the equivalent Von Mises stress and horizontal stre…
The medium carbon alloy steel Cr-Ni-Mo was melted by a 50 kg vacuum induction furnace, and the mechanical properties of test steel-maximum load and reduction of area at 600～1400 ℃ have been measured by Gleeble-3800 test machine. The test results showed that brittle region(reduction of area ≤60%)of the medium carbon Cr…
Based on established a model for changing of MnO content, it was obtained that with increasing apparent rate constant k, flux-steel interfacial area and reacting time, the MnO content in flux increased. The initial (MnO) and initial [Mn] influenced MnO content in flux. The test results showed that during steel 16Mn 4)…
Dynamic continuous cooling transformation(CCT)curves and structure transition of non quenched-tempered steel 34Mn2VN(0.30~0.34C,1.20～1.70Mn,0.014～0.018N,0.07～0. 12V)at 950℃ with average strain rate 2 s-¹and 15% strain, then cooling with 0.1～45 ℃/s different rate have been studied by Cleeble-1500 thermal simulation mac…
With 50 kg vacuum induction furnace melted ingot,breakdown at 1150 ℃ and two stage control rolling, 12 mm plate finishing rolling at 830 ℃,then relaxation for 27 s,water cooling at 720 ℃ with cooling rate 30~35 ℃/s, the ultra-low-carbon bainite steel-0.023C,1.63Mn,0.52Cu,0.25Mo,0.055(Nb+Ti),0.0011B had compound struct…
The φ5.0~22.0mm wire coils of 0.35C high strength cold heading steel SCM435 with short-time annealing were produced at Ma'anshan Iron and Steel by hot metal pretreating -50 t top and bottom combined blown converter melting-65 t LF refining -6 strand 140 mm×140 mm billet concasting -SMS high speed wire coil mill contro…
Because the sulphur content in steel NVA32(0. 12~0. 18C,1.30～1.60Mn)increases to 0.020% at 210 t BOF melting end point from original 0.005%,it shall be added 1000 kg binary synthetic slag CaO-CaF₂ and added 200 kg aluminium during BOF tapping and added Si-Mn alloy and Si-Al-Ba alloy to decrease sulphur content in stee…
Single pass reduction deformation experiment of a Ti-IF （interstitial atom free） steel - 0. 009C, 0. 017Si, 0. 13Mn, 0. 012P, 0. 013S, 0. 05Ti, 0. 025Als with deformation rate 0. 1, 1 and 20 s-1at 750 °C and 850 °C has been carried out by Thermecmastor-Z thermal simulation machine. The curves of work hardening rate -…
The test results showed that the volatilization rate of block pure molybdenum oxide(MoO₃)in heating period from 600 ℃ to1100 ℃ for 5 min was 30%,which of powder was up to 40%.As CaO reacts with MoO₃ to form CaMoO₄ to decrease the activity of MoO₃,the added CaO could depress the volatilization of molybdenum oxide. With…
The prediction model of end point temperature of molten steel refining in a 40 t ladle furnace has been developed bya modified artificial neural network calculation method. Compared with traditional Back-Propagation (BP) network calculation method, the modified artificial calculation method can increase prediction eff…
The isothermal tempering embrittlement test of 2. 25Cr-lMo alloy steel (% ： 0. 15C, 2. 32Cr, 0. 95Mo, 0. 011S,0. 009P,0. 006 8As,0. 003 5Sb,0. 007 9Sn,0. 01V) for hydrogenation reactor with 146. 7 MPa applied stress at 468 ℃ for 125 h and 400 h has been carried out. Based on the relation curves of temperature and impa…
The test results with electron backscattered difraction(EBSD)and scanning electron microscope(SEM) study and mechanical properties examination show that the structure of microalloying X70,X80 and X100 pipeline steels consists of acicular ferrite,granular bainite and a little lower bainite,and with decreasing effective…
The φ350 mm heavy forging products of 17-4PH precipitation hardening stainless steel were produced by EAF-VOD process melting and pig iron mold bottom casting φ320 mm electrode of 17-4PH steel(≤0.04C,16.20~ 16.50Cr,4.50~4.70Ni,3.30～3.40Cu,0.25～0.40Nb),then remelted to 2.5 t(φ510～550mm)ESR ingot and forged by 800 t hyd…
According to principle of swing control in electroslag remelting process and metallurgy model of swing control and melting curves using computer intelligent PID calculation method to trace and control,the quality of electroslag remelting ingot improved obviously as secondary current swing control for a 10 t electrosla…
The dissolution and precipitation of Nb-Ti carbides in austenite of a low carbon microalloying steel (0.09C,1.42Mn,0.035Nb,0.012Ti)have been analyzed by theoretical calculation method,and the austenite grain size with different heating temperature and the hardness of steel after solid solution treatment -aging were ex…
Corrosion is degradation of materials’ properties due to interactions with their environments, and corrosion of most metals (and many materials for that matter) is inevitable. While primarily associated with metallic materials, all material types are susceptible to degradation.
This paper reports the analysis of the C=O stretching region of poly(L-lactide). This spectral band splits into up to four components, a phenomenon that a priori can be explained in terms of carbonyl-carbonyl coupling or specific interactions (such as C-H...O hydrogen bonding or dipole-dipole). Hydrogen bonding can be…
Fibers seen in a new light? Inorganic–organic heterostructured cylindrical waveguides are prepared by a one-step electrospinning approach, where the photoluminescence from semiconductor quantum dots embedded in a fiber acts as an internal light source. Subwavelength-sized nanofibers (see image) with a length of severa…